Watch out for those "molded" sch. 80 nipples. Machined never leak. And never, ever, ever paste a SPEARS thd. union. We set our backflows on unions and what I was taught is to use slip unions and paste plastic into brass and tape plastic to plastic

I used to paste pvc, and tape brass to pvc. otherwise it always leaked . now I tape it all, using monster tape. that stuff is totally awesome.